Surly Monkey Nuts Dropout Spacers

These spacers sit inside your horizontal dropouts to push your rear wheel back by 14mm. This extra clearance is primarily used to prevent tire rub or to create enough space for a front derailleur clamp that might otherwise interfere with the tire.

Yes, the Monkey Nuts are compatible with both standard quick-release (QR) axles and 10mm bolt-on axles, making them a versatile solution for various mountain bike setups.

Because these spacers move your rear wheel back by 14mm, you will likely need to add a few links to your chain to accommodate the increased distance from the bottom bracket.

The Monkey Nuts are specifically designed for Surly frames with horizontal dropouts. While they fit many models, you should verify that your specific frame utilizes the standard horizontal dropout design before purchasing.

While they are designed to help with derailleur clearance, they can technically be used on single-speed setups if you need to adjust your chain tension or tire position. However, their primary purpose is to solve clearance issues for multi-speed drivetrains.